I don't think the address provided for sin matters. They would likely copy it from your copr (which is annotated at point of entry based on your verbal answer for pr card delivery). What address are you planning to provide for that? Same will be noted in sin. Check thisWhen we apply for the SIN upon landing, what address should we provide in case we don't have a permanent address yet? We'll be doing a soft landing, and staying in an airbnb. For our PR cards, we'll be giving our friend's address..